Download patch
ref: 736f84b2d539857f7fdd0e42353af80b4dccfe8d parent: cd4d8202016bd3eb5ed9144c8945edaba73c8cf4 author: Boqin Qin <bobbqqin@bupt.edu.cn> date: Mon Apr 20 19:47:34 EDT 2020
hugolib: Add Unlock before panic